3
3-13
C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
C7
50 m
1000 m
50 m
RS 485
repeater
PROFIBUS bus cable
(“Remote segment”)
Figure 3-8
Maximum Cable Length Between Two RS 485 Repeaters
If you do not assemble the bus cable directly onto the bus connector (for
example, when using an L2 bus terminal), you must take into account the
maximum possible spur line length.
The following table shows which maximum lengths of spur lines are
permitted per bus segment:
For 3 Mbps and above, use the programming device connecting cable with
order number 6ES7 901-4BD00-0XA0 to connect the programming device or
PC. You can use several programming device connecting cables with this
order number in one bus setup. Other spur lines are not permitted.
Table 3-4
Length of the Spur Lines per Segment
Transmission
Rate
Max. Length of
Spur Line per
S
t
Number of Nodes with a Spur
Line Length of ...
Segment
1.5 m or 1.6 m
3 m
9.6
to
93.75
Kbps
96 m
32
32
187.5 Kbps
75 m
32
25
500 Kbps
30 m
20
10
1.5 Mbps
10 m
6
3
3 to 12 Mbps
–
–
–
Length of Spur
Lines
Configuring MPI Networks and PROFIBUS-DP Networks
Summary of Contents for SIMATIC C7-626
Page 18: ...1 1 6 C7 626 C7 626 DP Control Systems C79000 G7076 C626 01 Product Overview ...
Page 122: ...A A 8 C7 626 C7 626 DP Control Systems C79000 G7076 C626 01 General Technical Specifications ...
Page 138: ...Glossary 10 C7 626 C7 626 DP Control Systems C79000 G7076 C626 01 Glossary ...
Page 142: ...Index 4 C7 626 C7 626 DP Control Systems C79000 G7076 C626 01 Index ...